O'Brien Ltd.'s outstanding bonds have a $1,000 par value, and they mature in 25 years. Their nominal annual, not semiannual yield to maturity is 8.25%, they pay interest semiannually, and they sell at a price of $750. What is the bond's nominal coupon interest rate? Do not round your intermediate calculations. a. 5.64% b. 2.94% c. 5.41% d. 2.82% e. 5.87%